Compound object

The C1 Learning Computer is an example of a compound object - the repeat button makes the computer repeat a word, the rewind and fast-forward button make the computer show a new word, and the enter button allows the player to enter different text for a concept.

Compound objects are a family of objects that have more than one part to them, which do different things when interacted with. These parts can be buttons, as in the case of lifts with up and down buttons, movers with right and left buttons, vendors which have specific buttons that the hand has to push; text parts for displaying text (as in the X-Ray); animation parts and others. Compare with simple object.